Mold for concrete supporting blocks



Sept. 22, 1925. L5L$33 R. ARMSTRONG MOLD FOR CONCRETE SUPPORTING- BLOCKS Filed Dec. 11. 1924 2 Sheets-Shaet 1 Sept. 22, 19255 554,833

R. ARMSTRONG MOLD FOR CONCRETE SUFPORTING BLOCKS Filed Dec. 11., 1.92 5 2 Sheets-Shem 2 Patented Sept. 22, 1925. Y

RUNNELS ARMSTRONG, OF PORT ARTHUR, TEXAS.

MOLD FOR CONCRETE SUPPORTING BLOGKfi.

Application filed December 11, 1924. Serial No. 755,287.

To all whom it may concern Be it known that I, RUNNnns ARMSTRONG, a citizen of the United States, residing at Port Arthur, in the county of Jefferson. and State oi Texas, have invented certain new and useful improvements in Molds for toncrete Supporting Blocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

lhisinvention relates to a mold primarily designed for use in the casting of supporting blocks for the sills or beams of buildings, particularly at the corners or otherwise, which blocks are usually made trom concrete or other plastic material.

It is aimed to provide a novel construction wherein the sections and the parts of said sections may be similar in order to simplify the structure and reduce the cost of manufacture.

Another object is to provide a construction of mold having preferably two sections whereby the walls of each section will be angularly disposed, in cooperation with suitable angular fastcnings engaging and elliciently holding the corners of the sections.

Additional objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

In said drawings Figure l is a view in side elevation of the mold;

Figure 2 is a plan view of the mold,

Figure 3 is a sectional view taken on the line 3-3 of Figure 2,

Figure 4 is a perspective view of one of the mold sections looking toward the interior;

Figure 5 is a perspective view of one of the mold sections looking toward the exterior;

Figure 6 is a side elevation showing a supporting block as cast by the mold, havin sills connected thereto, and

*igure 7 is a plan view of the parts of Figure 6.

Like reference characters designate like or similar parts in the different views.

Referring specifically to the drawings, the mold such as is generally disclosed at A is adapted to cast blocks or columns B of concrete or other plastic material. These blocks may of course be used for any desired purpose and be of any desired shape. These blocks have a rectangular base as at it), a superimposed smaller and thinner rectangular portion 11, a frusto-pyramidal portion 12 disposed on the portion 11 and a rectangular portion or tube 13 disposed on the portion 12. All of said portions are of course integral and they are solid except for the intu'position of a bolt 14 therein, anchored by means of its head 15 and having screw threads at 16 extending above the portion 13 so that the bolt may pass through sills such 17 at their junction and fastening them together by means of a nut 18. The sills 17 represent part of a substructure of a building as one example of the use of the invention since thesame is primarily designed to support buildings, as at the corners.

The mold constituting my present improvement is made in two similar sections C. One of the sections is shown,in Figure 4 in perspective as looking toward the interior while one of said sections is shown in Figure 5 in perspective as looking toward the exterior.

Each section C has two side plates 19 having their proximal ends in overlapping relation and suitably fastened together. Intermediate side plates 20 are also employed having their ends overlapping and secured together, being shorter than the plates 19 and extending partly above the upper surface of the side plates 19 and partly below said upper surface. At 21, upper side plates are provided which have their ends overlapping and secured together, which are shorter than the plates 20 and which extend partly above and partly below the upper surfaces of the plates 20. The lower edges of plates 21, except where they are adapted for abutment with adjacent plates 21, are beveled downwardly and inwardly as at 22. Each section constructed as described, has the plates stepped at the ends as well shown in Figure l and also in Figure 2.

The sections are adapted to be arranged together as in Figure 2 with the step ends of the plates 19, 20, and 21 interfitting so that plastic material may be placed or tamped into the mold formed by said sections C to produce the structure illustrated in Figures 6 and 7 at B, itbeing clear that the inner surfaces of plates 19 and lower surfaces of plates 20 form the portion 10, the inner surfaces of plates 20 and edges 22 form the portions 11 and 12, and that the inner surfaces of the plates 21 form the portion 13, the bolt 14 being placed in embedded position within the plastic material at the appropriate time in the course of manufacture.

An essential featureot the invention is the means by which the sections C are held together during the molding operation. Such means comprises a lug 23 on one of the plates 19 and 21 of each section, while the other plates 19 and 21 have an L-shaped latch 24 pivoted thereto by pins or the like at 25. The distal ends of the latches 24 are hooked or extend at a right angle as at 26.

Due to the construction of the latches, when the sections are in operative position, the corners at the separable ends of the mold are surrounded by the latches and the same are anchored at their pivots 25 and at the pins 23, thus "forming an exceedingly enicient joint and rigid connection particularly since the stepped ends of the plates engage the sides of the adjacent plates.

It is obvious that the mold may be readily assembled when desired by securing the hooks 26 of the latches on the pins 23 and that the mold may be separated or disassembled by unlatching the hooks 26 from pins 23.

Various changes may be resorted to provided they fall Within the spirit and scope of the invention.

that is claimed is 1. A mold of the class described consisting of substantially L-shaped sections, said sections each comprising plates of different lengths arranged at different elevations and progressively inwardly, and means to secure the sections together.

2. A mold of the class described'consisting of substantially L-shaped sections, said sections each comprising plates of different lengths arranged at different elevations and progressively inwardly, and means to secure the sections together comprising latches substantially 0t L-shape arranged at the separable corners of the sections and in contact with each section.

3. A mold of the class described consisting of two sections, each section having lower plates at a right angle to each other and of the same length, one lower plate oi each section having its ends in contact with the adjacent side of the companion plates, each section having intermediate and upper plates of less length than the lower plates at different elevations, L-sha-ped latches pivoted to certain of the plates and intimately engaging the sections at the corners, and means on certain of the other plates engaged by the distal ends of said latches.

In testimony whereof I affix my signifiture.

RUNNELS ARMSTRONG 

